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Doubt & Answer Explanation

Doubt

Which of the following is a protic solvent

1)

DMSO


2)

DMSO


3)

DMF


4)

MeOH


5)

HMPT

(Please state the reason.)

Answer Explanation

Protic solvents solvate anions (negatively charged solutes) strongly via hydrogen bonding.  Aprotic solvents  tend to have large dipole moments (separation of partial positive and partial negative charges within the same molecule) and solvate positively charged species via their negative dipole.

Therefore the answer is MeOH as it solvates anions via hydrogen bonding. All the other solvents mentioned are aprotic and solvate positively charged species via their negative dipole.

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